During gym class, Raul walks briskly for a half hour. Jenna decides to sprint and run the bleachers for the same amount of time. Which statement best compares the cellular processes occurring in each student during this time?

Sprinting and running bleachers are more intense activities than brisk walking, so Jenna’s muscles are more likely to need energy faster than oxygen can be supplied. Her muscle cells therefore rely more on anaerobic respiration, which produces lactic acid. Thus, Jenna’s cells are producing more lactic acid than Raul’s cells.

AI-written and checked against the verified answer.